Adaptive Guide Bushing With Elastic Fit for Laser Tube Accuracy
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Solution Overview
Problem
Laser cutting systems face challenges in achieving tight tolerances for small feature sizes due to improper fitting of tubing within the guide bushing, leading to distortions or errors in cuts, especially at small radii, which is critical for medical devices.
Innovation Solution
An adaptive guide bushing system using an elastic material, such as an O-ring, to adjust the fit of tubing within the guide bushing, allowing for tighter tolerances by expanding and contracting to accommodate various tube diameters, reducing friction-related errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the tubing fit within the guide bushing is made tight, then the positioning accuracy is improved, but the friction increases causing cut distortions
Solution Approach 1:
The guide bushing incorporates an elastic element that changes its dimensional parameters dynamically. When tubing is inserted, the elastic element compresses to reduce the inner diameter, creating a tight fit for positioning accuracy. When tubing is removed, the elastic element returns to its original state, reducing friction for the next operation. This parameter change resolves the contradiction between tight fit for accuracy and loose fit for low friction.
Solution Approach 2:
The guide bushing transitions from a static structure to a dynamic one through the elastic element. The inner diameter of the bushing is no longer fixed but adapts based on the presence of tubing. This dynamic adjustment allows the system to achieve tight positioning when needed while minimizing friction during operation, resolving the contradiction between these two requirements.
2Force
If the tubing fit within the guide bushing is made loose, then the friction is reduced, but the positioning accuracy deteriorates causing cut errors
Solution Approach 1:
The elastic element in the guide bushing changes its inner diameter parameter based on tubing insertion. When tubing is present, the inner diameter reduces to provide tight positioning accuracy. When tubing is absent, the inner diameter increases to reduce friction. This dynamic parameter change resolves the contradiction between loose fit for low friction and tight fit for accuracy.
3Device complexity
If a fixed guide bushing is used, then the device complexity is low, but the adaptability to different tube diameters is poor
Solution Approach 1:
The guide bushing uses an elastic element that changes its inner diameter to accommodate different tube diameters. This allows a single bushing structure to adapt to various tube sizes without requiring multiple fixed-size bushings, resolving the contradiction between simple structure and high adaptability.
Solution Approach 2:
The guide bushing with elastic element serves multiple functions: it provides tight positioning for different tube diameters, reduces friction during operation, and accommodates various tube sizes. This multi-functionality resolves the contradiction between simple fixed structure and adaptable universal design.
4Ease of manufacture
If the guide bushing is rigid, then the manufacturing simplicity is high, but the cutting precision for small radii is poor
Solution Approach 1:
The guide bushing incorporates an elastic element that changes its dimensional parameters to provide tight fit for small radius tubing. This elastic adaptation allows precise positioning for small radius cuts while maintaining relatively simple manufacturing processes, resolving the contradiction between rigid simple structure and flexible precise performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves improved cutting tolerances of +/-0.00005″, significantly enhancing the accuracy and quality of laser cuts in medical devices by minimizing distortions and errors.
Implementation Method 1
An adaptive guide bushing is operably coupled with the beam delivery fixture. The adaptive guide bushing includes an elastic material to hold the tubing being laser cut.
Implementation Method 2
If the fit is too tight, the friction between the tubing and the bushing will introduce errors in laser cuts
Data Source
AI summary
An adaptive guide bushing for laser workpiece cutting systems, the adaptive guide bushing including an clastic member that expands and contracts to hold a workpiece within a central opening for laser cutting.